Hose coupling



Dec. 9, 1924. 1,518,778

J. P7 EASTMAN HOSE COUPLING Filed Dec. 21, 1920 n J jpum- '02.

mw f/A @Z/Q/Z Patented Dec. 9, 1924.

UNITED STATES JOSEPH r. EASTMAN, or MANITOWOC, WISCONSIN.

HOSE COUPLING.

Application filed December 21, 1920. Serial No. 432,220.

To all whom it may concern.

Be it known that JOSEPH P. EASTMAN, a 1

Citizen ofthe United States, and resident of Manitowoc, in the county ofManitowoc and State of Wisconsin, has invented certain new and usefulImprovementsin Hose Couplings, and I do hereby declare that thefollowing is a full, clear, and exact description thereof.

My invention refers to new and useful in] provements in means forconnecting metallic couplings, unions and the like, to flexible and moreparticularly non-expansible tubing. In my former application, Serial No.314,650, I have provided for obtaining a fluid-ti ht connection betweencouplings and expansil ile tubing, wherein an expander-or sleeve isinserted into the end of the tubing for expanding the same within thecoupling. However, in certain tubing where a hard central core of anon-expansible nature is used, it is impossible to employ an expander,and hence, great difficulty has been encountered in obtaining a tightand rigid connection between the tubing and coupling, whereby thecoupling isvprevented from strip ing ofi.

It is therefore the principal ObJGCt of the invention to provide anarrangement for.

connecting a coupling to tubing of this character in such a manner thatthe same cannot be withdrawn or stripped from the tubing.

With this general object in view, the in-' vention resides in the novelfeatures of construction and combination and arrangement of parts, whichwill be hereinafter more particularly described and claimed and shown inthe accompanying drawings, in

which:

Figure 1 represents a part elevationaland part sectional view of atubing having a. metallic coupling disposed thereon. I

Figure 2 is an el evational view of pressing band employed. 7 r

While the drawings show the invention applied in a coupling, it isobvious that the essential features thereof may be used in connectionwith unions andthe like and that various minor changes may be made inthe form and proportion of the several parts, without departing from theprinciples of the invention.

Referring more particularly to the drawings, the numeral 1 denotes armend portion of a section of flexible tubing, havin the coma central coreof non-elastic material, whic in the present instance is a metalliccoil 1. The flexible tubing may be multiple, as shown in Figure 1, ifdesired. Inserted over the end of'the tubing is a coupling member '2,which includes an externally threaded nipple 3, having a boresubstantially the diameter of the bore of the tubing 1, and anexternally' threaded sleeve 4 of substantially the same diameter as saidtubing, over the end of which it is adapted to-be disposed. The shoulder5, formed by the difference in diameters of the bores of the twodifferent parts of the coupling member,

abuts the. end of the tube as shown. The

free edge of the inner surface of the sleeve 4 is slightly outwardlyflared as at 6.

The coupling 2 is secured tothe end of the tubing 1, by means of aclamping and retaining ring 7 and a bendable compression band 8.

of the sleeve 4. Thus the band is easily" located within the ring 7, itbeing of considerably less widththan the latter.

These members are slipped over the end of the tubing before the couplingis The outer portion of the ring 7 is intera nally screw threaded,forengagement with the threads of the sleeve 4, and its opposite end isformed with an annular inwardly extending inclined shoulder, the innerdiameter' of this part of the ring being substantially the same "as theexternal diameter of the tubing. The exterior of'the' clamping andretaining ring is preferablyhexagonal or otherwise polygonalincross-section, so to permit the effective engagement of a wrench orthe like therewith. Similarly the coupling 2 is provided with a knurledridge 9. y d

The bendable compression ring 8 has its inner surface provided withapluralityof annular barbs 10, in order that it may more effectivelyengage the outer surface of the tubing upon which it is compressed.Extended from both ends of the band to a point approximately its centerare a plurality of transverse kerfs 11, those at one end being staggeredwith relation to those of the opposite end, whereby the ends of the bandmay be readily bent into the exterior surface of the tubing, whilethecentral portion of the band retains its original diameter.

In assemblying the several parts of the invention and the elements withwhich it is associated, the same are first arranged upon the tubing inthe relation shown in Figure 1 of the drawing, it being borne in mindthat the band 8 is of the approx imate diameter as the tubing beforebeing compressed. The clamping ring 7 is then engaged with the threadedsleeve 4 of the couplingand is gradually threaded on to the sleeve untilthe band 8 engages the flared shoulder 6. At the same time, the oppositeend of the band will be engaged by the annular inclined shoulder of theclamping ring 7, resulting in the bending or compressing of the kerfedends of the band into the tubing. While the central portion of the bandretains its normal di-' will therefore be seen that the present in-.

receiving one end of said tubing, aring surrounding said tubing andhaving staggered kerfs extending from opposite edges thereof, and acompression sleeve surrounding said tubing and threaded to said memher,said member and said sleeve having oppositely extending concave facesand said ring having a convex outer portion adapted to cooperate withsaid faces, said ring having a plurality of inwardly directed teeth, allof such teeth extending towards the said end of such tubing, wherebywhen said sleeve is screwed upon said member, the teeth of said ring arecaused to bite into said flexible tubing, the nonelastic core of saidtubing preventing collapsing thereof.

In testimony that I claim the foregoing I have hereunto set my hand atManitowoc in the county of Manitowoc and State of Wisconsin.

JOSEPH P. EASTMAN.

